CUBA 1934 - Sc 320 - (EDIFIL 275) for the regularly issued stamp.
A very scarce Security Banknote Co. imperforate plate and color proofs of the 5 centavos value of the Carlos J. Finlay stamp in a horizontal pair. These were printed in sheets of 300 stamps (Two panes of 150 stamps each, separated by a vertical gutter) Only one sheet, or at the most, 2 sheets of 300 stamps are believed to exist. No gum as found in the archives of the SBC.